It looks like bad usb drivers. (EtronXHCI.sys)
Unplug all of your USB devices, excluding mouse and keyboard
Download the latest drivers at: GIGABYTE - Motherboard - Socket 1155 - GA-Z68X-UD3H-B3 (rev. 1.3)
Select windows 7 x64,
Download the following drivers:
Realtek Function driver for Realtek Azalia audio chip
Intel INF installation
Intel Management Engine Interface
Realtek LAN Driver
Marvell SATA Controller Driver
Intel® Rapid Storage Technology
Etron USB 3.0 Driver
Intel VGA Driver
Install each driver and restart your computer after each driver installs, continuing the process for each driver.
After all the drivers are installed run the following:SFC /SCANNOW Command - System File Checker
Follow option 2, step 2
then follow option 3 and upload the log file.
If everything is ok, then you should be able to plug all of your USB devices, back in, including the Bluetooth.
While usually advised against, it may be beneficial to update your BIOS to UEFI, now this is not required, and may cause your system to brick if there is an power outage while flashing, but there are more features that would be available to your board and may come with stability improvements as well.
Also one last word of advice for the BIOS update is that you need to uninstall the motherboard utilities from windows if you do decide to update the BIOS.